All US trained MDs and DOs are fully licensed in all of Canada (except PEI and Sask. they can be tricky). If you are Canadian you can enter the Canadian residency match as a Canadian medical graduate and get first dibs with all the lucky few who were able to graduate from a Canadian institution.
You may not be able to point us out, but there are a good amount of us Canadians invading your MD/DO schools. They make it especially easy for Canadians to get working Visas in the US.
Now, as far as that burning desire is concerned the only reasons you should answer "Yes" to all the following before you even think about moving:
1) Do you apologize to somebody when THEY bump into YOU?
2) Do you hold the door for the person behind you despite how far away they are? (could be up to half a kilometer.)
3) Are you OK with the fact that most Canadian women can drink American men under the table?
4) Do you love maple syrup?
Those should cover the basics.